Yea if you hit a pot hole in the v1s you will wake the little one up... BANG !
I had the bilstein b12 kit on my m3 and they were spot on ! I try and do stuff behind my mrs back when it comes to cars, as she goes mental at the amount of money i spend and she never noticed when i fitted them. Im not going to lie and tell you they are more comfortable than oem, but if the gti setup is simelar to the m3 in terms of comfort, id be very happy with the ride quality even if it was factory fit
Also id imagine the new b12 set up with the eibach springs would be even more comfortable as they are slightly softer than the old h&r, the lovering on the is 30mm which is the perfect drop for the gti too
(thats what i had my kws at )
Performance wise the were grate they were nice on the road, and the car was grate on the track too, ive got a good test route that shows up bad damping, take a type r over it at 60 and it will throw its self off the road ! The bilsteins felt planted over this route, best yet i felt infact, although tbh the gti with the standard sachs doesnt fair to bad either on this route.
Im sure you will find a kit for cira £650, fit and forget plus they have good residuals come selling time.